180 lines
3.2 KiB
C
180 lines
3.2 KiB
C
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/*++
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Copyright (c) 1993 Microsoft Corporation
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Copyright (c) 1993 Digital Equipment Corporation
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Module Name:
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ipi.c
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Abstract:
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This module implement Alpha AXP - specific interprocessor interrupt
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routines.
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Author:
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David N. Cutler 24-Apr-1993
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Joe Notarangelo 29-Nov-1993
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#include "ki.h"
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VOID
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KiRestoreProcessorState (
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IN PKTRAP_FRAME TrapFrame,
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IN PKEXCEPTION_FRAME ExceptionFrame
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)
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/*++
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Routine Description:
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This function moves processor register state from the current
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processor context structure in the processor block to the
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specified trap and exception frames.
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Arguments:
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TrapFrame - Supplies a pointer to a trap frame.
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ExceptionFrame - Supplies a pointer to an exception frame.
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Return Value:
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None.
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--*/
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{
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PKPRCB Prcb;
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//
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// Get the address of the current processor block and move the
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// specified register state from the processor context structure
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// to the specified trap and exception frames
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//
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#if !defined(NT_UP)
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Prcb = KeGetCurrentPrcb();
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KeContextToKframes(TrapFrame,
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ExceptionFrame,
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&Prcb->ProcessorState.ContextFrame,
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CONTEXT_FULL,
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KernelMode);
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#endif
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return;
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}
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VOID
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KiSaveProcessorState (
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IN PKTRAP_FRAME TrapFrame,
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IN PKEXCEPTION_FRAME ExceptionFrame
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)
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/*++
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Routine Description:
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This function moves processor register state from the specified trap
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and exception frames to the processor context structure in the current
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processor block.
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Arguments:
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TrapFrame - Supplies a pointer to a trap frame.
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ExceptionFrame - Supplies a pointer to an exception frame.
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Return Value:
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None.
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--*/
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{
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PKPRCB Prcb;
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//
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// Get the address of the current processor block and move the
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// specified register state from specified trap and exception
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// frames to the current processor context structure.
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//
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#if !defined(NT_UP)
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Prcb = KeGetCurrentPrcb();
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Prcb->ProcessorState.ContextFrame.ContextFlags = CONTEXT_FULL;
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KeContextFromKframes(TrapFrame,
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ExceptionFrame,
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&Prcb->ProcessorState.ContextFrame);
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#endif
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return;
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}
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BOOLEAN
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KiIpiServiceRoutine (
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IN PKTRAP_FRAME TrapFrame,
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IN PKEXCEPTION_FRAME ExceptionFrame
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)
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/*++
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Routine Description:
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This function is called at IPI_LEVEL to process any outstanding
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interprocess request for the current processor.
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Arguments:
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TrapFrame - Supplies a pointer to a trap frame.
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ExceptionFrame - Supplies a pointer to an exception frame
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Return Value:
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A value of TRUE is returned, if one of more requests were service.
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Otherwise, FALSE is returned.
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--*/
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{
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ULONG RequestSummary;
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//
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// Process any outstanding interprocessor requests.
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//
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RequestSummary = KiIpiProcessRequests();
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//
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// If freeze is requested, then freeze target execution.
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//
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if ((RequestSummary & IPI_FREEZE) != 0) {
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KiFreezeTargetExecution(TrapFrame, ExceptionFrame);
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}
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//
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// Return whether any requests were processed.
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//
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return (RequestSummary & ~IPI_FREEZE) != 0;
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}
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